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<h1><a name=Top></a>Area Calculation</h1>
<h3>Introduction</h3>
<p>Area calculation complies with the American National Standard method 
 for measuring floor area in office buildings (ANSI/BOMA Z65.1-1996). The 
 calculation is based on the geometries of the building components in the 
 building information models. To get the best result the walls and spaces 
 should be modeled carefully. Low quality modeling such as missing spaces 
 can lead to wrong calculation results. Before areas can be reliable calculated, 
 external walls have to be defined. This can be done in <a href="../../../Help/html/Compartmentation.htm">Compartmentation 
 View</a>. The results of the calculations are seen in the <a href="../../../Help/html/Info.htm">Info 
 View</a>, <a href="../../../Help/html/3D.htm">3D View</a> (<a href="file:///C:/Programs/GSA/Solibri/SMC3.1/plugins/GSA/doc/BOMA_Categories.htm#Area_Visualization">visualizations</a>), 
 and reports of <a href="ANSI_BOMA_View.htm#Top">ANSI/BOMA View</a>. </p>
<p>There are two possible calculation methods, ANSI/BOMA or GSA. The used 
 method is set in the <a href="ANSI_BOMA_View.htm#Settings">ANSI/BOMA View 
 Settings</a>. All properties used in the calculations, and their calculation 
 principles are listed below.</p>
<h3>Space</h3>
<h4>GSA BIM Area</h4>
<p>The area calculated from the geometry of a space component by removing 
 areas of intersecting columns and walls. This quantity is visualized in 
 the 3D view with black text.</p>
<h4>Polygon Area</h4>
<p>The polygon area is base for the all other properties. It includes the 
 space area and bottom area of walls around itself. The amount of wall 
 bottom area depends on the ANSI/BOMA Space Category of the space. The 
 space category is either get from the <a href="Space_Properties.htm#ANSI_BOMA_Space_Classification">ANSI/BOMA 
 Space Category</a> or it is based on the <a href="Space_Properties.htm#GSA_STAR_Type">GSA 
 Space STAR Type</a>. You can also set the category <a href="ANSI_BOMA_View.htm#ANSI_BOMACategoryHandling">manually</a>.</p>
<p>For <span style="font-weight: bold;"><B><b>Office area </B></span><span style="font-weight: normal;">and</span></b><span 
 style="font-weight: bold;"><B><b> Store area</b></B></span>: area + half of the 
 wall bottom area of walls between another Office, or Store areas. If the 
 exterior wall contains windows, whose height is at least half of the space 
 height, the area from space boundary to window (DOMINANT PORTION) is included.</p>
<p align="center" class="whs1"><img src="polygon.png" x-maintain-ratio="TRUE" width="499px" height="722px" border="0" class="img_whs2"></p>
<p align="center" class="whs1">&nbsp;</p>
<p>For <span style="font-weight: bold;"><B><b>Building Common</b></B></span> and 
 <span style="font-weight: bold;"><B><b>Floor Common</b></B></span>: area + wall 
 bottom area, when a space in other side of the wall is not Vertical Penetration. 
 If the space on the other side of the wall is also Building Common (or 
 Floor Common), half other wall's bottom area is included.</p>
<p align="center" class="whs1"><img src="polygon2.png" x-maintain-ratio="TRUE" width="916px" height="457px" border="0" class="img_whs3"></p>
<p class=whs2>For <span style="font-weight: bold;"><B><b>Vertical Penetration 
 and PBS Specific areas</b></B></span>: area + wall bottom area. If the space 
 on the other side of the wall is also Vertical Penetration or PBS Specific 
 Area, half other wall's bottom area is included.</p>
<p class=whs2 style="text-align: center;" align=center><img src="polygon3.png" x-maintain-ratio="TRUE" width="299px" height="551px" border="0" class="img_whs4"></p>
<h4>Basic Rentable Area</h4>
<p>Floor RU Ratio * Space Polygon Area</p>
<h4>Office Rentable Area</h4>
<p>Building RU Ratio * Space Basic Rentable Area</p>
<h3>Floor </h3>
<h4>Floor Gross Area</h4>
<p>Total area of the floor including all walls, columns and spaces. If 
 the floor has a Gross Area Compartment (ref. SMC Help, <a href="../../../Help/html/Compartmentation.htm">Compartmentation 
 View</a>), it's area is used. Otherwise, it is the sum of bottom areas 
 of all walls, columns and spaces in the floor. The area is visualized 
 with green dotted line.</p>
<p><img src="gross.png" x-maintain-ratio="TRUE" width="240px" height="365px" border="0" class="img_whs5"></p>
<h4>Gross Building Area w/o Parking</h4>
<p>Parking spaces are removed from Gross Building Area. A space is a parking 
 space, if its <a href="Space_Properties.htm#GSA_STAR_Type">GSA STAR Space 
 Type</a> is STP.</p>
<h4><a name=MeasuredGrossArea></a>Floor Measured Gross Area</h4>
<p>Sum of usage areas of all spaces in one floor. Exterior walls are not 
 included in this area. The area is visualized with blue dotted line.</p>
<p><img src="measuredgross.png" x-maintain-ratio="TRUE" width="240px" height="296px" border="0" class="img_whs6"></p>
<h4>Floor Major Vertical Penetration Polygon Area</h4>
<p>Sum of all Vertical Penetration spaces' Polygon Areas in one floor.</p>
<p><img src="vertpen.png" x-maintain-ratio="TRUE" width="202px" height="348px" border="0" class="img_whs7"></p>
<h4>Floor PBS Specific Polygon Area</h4>
<p>Sum of all PBS Specific spaces' Polygon Areas in one floor.</p>
<h4>Floor Rentable - &nbsp;Building Common Area</h4>
<p>Sum of all Building Common spaces' Polygon Areas in one floor.</p>
<h4>Floor Rentable - Floor Common Area</h4>
<p>Sum of all Floor Common spaces' Polygon Areas in one floor.</p>
<p><img src="common.png" x-maintain-ratio="TRUE" width="225px" height="374px" border="0" class="img_whs8"></p>
<h4>Office Polygon Area</h4>
<p>Sum of all Office spaces' Polygon Areas in one floor.</p>
<p><img src="office.png" x-maintain-ratio="TRUE" width="267px" height="424px" border="0" class="img_whs9"></p>
<h4>Store Polygon Area</h4>
<p>Sum of all Store spaces' Polygon Areas in one floor.</p>
<h4>Floor Office and Rentable Area</h4>
<p>Office Polygon Area + Store Polygon Area + Floor Rentable - &nbsp;Building 
 Common Area. If <a href="ANSI_BOMA_View.htm#Settings">GSA Calculation 
 Method</a> is used, Floor rentable - Floor Common area is also added.</p>
<h4>Rentable and Usable Area</h4>
<p>Floor Measured Gross Area - (Floor Major Vertical Penetration Polygon 
 Area + PBS Specific Polygon Area)</p>
<h4>Floor Common Area</h4>
<p>Rentable and Usable Area - Floor Office and Rentable Area</p>
<h4>Floor RU Ratio</h4>
<p>Rentable and Usable Area / Floor Office and Rentable &nbsp;Area. 
 <a href="ANSI_BOMA_View.htm#Settings">If GSA Calculation Method</a> is 
 used, value is always 1.</p>
<h3>Building</h3>
<h4>Office Rentable Area</h4>
<p>Sum of all Office, Store, and Building Common spaces' Polygon Areas 
 in the building.<a href="ANSI_BOMA_View.htm#Settings"> If GSA Calculation 
 Method</a> is used, Floor Common polygon areas are also added.</p>
<h4>Building RU Ratio</h4>
<p>Office Rentable Area / (Office Rentable Area - sum of all Building Common 
 spaces'&nbsp;Polygon Area). If <a href="ANSI_BOMA_View.htm#Settings">GSA 
 Calculation Method</a> is used, Floor Common areas are also added.</p>
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